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package jdk.graal.compiler.core.test;

import java.io.ByteArrayOutputStream;

import org.junit.Test;

import jdk.graal.compiler.api.directives.GraalDirectives;
import jdk.graal.compiler.debug.LogStream;
import jdk.graal.compiler.debug.TTY;
import jdk.graal.compiler.options.OptionValues;
import jdk.graal.compiler.phases.BasePhase;

public class ReportHotMetricsTest extends GraalCompilerTest {

    public static final boolean PRINT_STDOUT = false;

    static int sideEffect;

    public static int snippet01(int limit1) {
        int result = 0;
        for (int i = 0; GraalDirectives.injectIterationCount(100000, i < limit1); i++) {
            // this if is missing a profile and should be reported
            if (i > sideEffect) {
                // this kill should be reported
                GraalDirectives.sideEffect(123);
            } else {
                result += i;
            }
        }
        return result;
    }

    @SuppressWarnings("try")
    @Test
    public void testAbsNegate() {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try (TTY.Filter ttyFilter = new TTY.Filter(new LogStream(bos))) {
            OptionValues opt = new OptionValues(getInitialOptions(), BasePhase.PhaseOptions.ReportHotMetrics, "*.snippet01", BasePhase.PhaseOptions.ReportHotMetricsAfterPhases,
                            "BoxNodeIdentity=*.snippet01");
            test(opt, "snippet01", 100);
        }
        // the missing profile
        assertTrue(bos.toString().contains("[Hot Code Warning] Unknown profile for"));
        // the killing of any
        assertTrue(bos.toString().contains(" kills any and has relative"));

        if (PRINT_STDOUT) {
            TTY.println("%s%n", bos.toString());
        }
    }
}
